42775923 has 4 divisors (see below), whose sum is σ = 57034568. Its totient is φ = 28517280.

The previous prime is 42775913. The next prime is 42775979. The reversal of 42775923 is 32957724.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42775923 - 2⁴ = 42775907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42775903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7129318 + ... + 7129323.

It is an arithmetic number, because the mean of its divisors is an integer number (14258642).

Almost surely, 2^42775923 is an apocalyptic number.

42775923 is a deficient number, since it is larger than the sum of its proper divisors (14258645).

42775923 is a wasteful number, since it uses less digits than its factorization.

42775923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14258644.

The product of its digits is 105840, while the sum is 39.

The square root of 42775923 is about 6540.3304962364. The cubic root of 42775923 is about 349.7301947892.

The spelling of 42775923 in words is "forty-two million, seven hundred seventy-five thousand, nine hundred twenty-three".